On the Event Variable Groups form, enter the name of the event variable for which you want to set the initial (default) value.
On the Event Actions form, enter the name of the event message-related variable that you want to restrict access to.
On framework events, event message-related variables are copied from and synchronized with event parameters. For example, on an action of a handler for the IdoOnItemUpdate event, you can restrict access to the row properties being sent with the IDO update.
On the Event Handler Status form, this field is display-only and shows the names of event variables.
For more information, see "About Event Variables and Initial States" in the Guide to the Application Event System.